AWS Lambda Event Handler

This is the Python code to handle post and get requests and access the AWS DynamoDB:

import boto3
import json
import uuid

print('Loading function')
dynamo = boto3.client('dynamodb')


def respond(err, res=None):
    return {
        'statusCode': '400' if err else '200',
        'body': err.message if err else json.dumps(res),
        'headers': {
            'Content-Type': 'application/json',
        },
    }

def my_put_item(dynamo, x):
    dynamo.put_item(
    TableName="survey-table",
    Item={
        'survey-id': {"S":str(uuid.uuid4())},
        'first_name': {"S": x['first_name']},
        'major': {"S": x['major']},
        'last_name': {"S": x['last_name']},
        'favorite_language': {"S": x['favorite_language']},
        'job': {"S": x['job']},
    }
    )

def my_get_item(dynamo):
    items = dynamo.scan(
    TableName="survey-table"
    )["Items"]
    newItems = []
    for item in items:
        newItem = {
            "favorite_language": item["favorite_language"]["S"],
            "major": item["major"]["S"],
            "job": item["job"]["S"]
        }
        newItems.append(newItem)
    return newItems

def lambda_handler(event, context):
    '''Demonstrates a simple HTTP endpoint using API Gateway. You have full
    access to the request and response payload, including headers and
    status code.

    To scan a DynamoDB table, make a GET request with the TableName as a
    query string parameter. To put, update, or delete an item, make a POST,
    PUT, or DELETE request respectively, passing in the payload to the
    DynamoDB API as a JSON body.
    '''
    print("Received event: " + json.dumps(event, indent=2))

    operation = event['httpMethod']
    if operation == 'POST':
        #payload = event['queryStringParameters'] if operation == 'GET' else json.loads(event['body'])
        body=json.loads(event['body'])
        x = {"first_name": body["FirstName"], "last_name":body["LastName"], "major":body["major"], "favorite_language": body["favoritelanguage"], "job": body["job"]}
        return respond(None, my_put_item(dynamo, x))
    elif operation == 'GET':
        asdf = my_get_item(dynamo)
        print(asdf)
        return respond(None, asdf)
    else:
        return respond(None)#(ValueError('Unsupported method "{}"'.format(operation)))